Malicious PDF — malware analysis report

Static analysis result for SHA-256 96f8bb4b0f89d4ce…

MALICIOUS

PDF

79.2 KB Created: 2021-06-25 12:30:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b601583b200caf0a738f40b19d8ec1e6 SHA-1: 275df1b1f3260344e90b2bc945e493f82ec7905d SHA-256: 96f8bb4b0f89d4ced90fb18116a5eb6d35b20735ad848d7f581d5fae1ca891de
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/8hhnt0sb40u6htf2lke74hjso9/31743033846.pdf
    • http://banghetretruc.com/media/ftp/file/tulipukeno.pdf
    • http://krevue.cz/UserFiles/File/resowixidosa.pdf
    • https://wickedcheesy.com/images/file/72423469350.pdf
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606cdf1daf401---33437910338.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608574762ac97---8804838613.pdf
    • http://markone-tools.com/upload/files/gezejuxafazamek.pdf
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/ralapufuluguk.pdf
    • http://caratow.eu/userfiles/file/nivotasijuronubire.pdf
    • https://renault-service.com/userfiles/65115635846.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/43b78fd187cce0b04ecd5f41f5d16777/1526970263.pdf
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16071a1670b289---narobemonur.pdf
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607729f6cc04c---69868475634.pdf
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/16090b0570bcc7---60393675917.pdf
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085bdf3ae2a1---lelidarisujafus.pdf
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/c3e66a04594a002625c2bf5be8e6ee0c/82762340050.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=galaxy+attack+space+shooter+apk
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d086.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD086 16792 bytes
font_01_sfnt_off0000e898.bin
fea4d732b92a28e4cb574e5db2ff62fb0fab9532d0c3f4baede7fcac2beef085		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE898 18868 bytes
font_02_sfnt_off0001178c.bin
414791b0506be018674ee7c40867af99ab9f3ab7275d13c916dc80e166f3ba7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1178C 10624 bytes

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